Which one of the following is not correct?

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Question

(C) The chemical formula of pyrophosphoric acid is $H_4P_2O_7$. In this structure,phosphorus is in the $+5$ oxidation state. It contains four $P-OH$ b

Vedclass · Accepted Answer

Pyrophosphoric acid contains two $P-H$ bonds

Vedclass · Answer

(C) The chemical formula of pyrophosphoric acid is $H_4P_2O_7$. In this structure,phosphorus is in the $+5$ oxidation state. It contains four $P-OH$ bonds,two $P=O$ bonds,and one $P-O-P$ linkage. It does not contain any $P-H$ bonds. Since it has four $P-OH$ groups,it is a tetrabasic acid. Orthophosphoric acid $(H_3PO_4)$ is prepared by dissolving $P_4O_{10}$ in water: $P_4O_{10} + 6H_2O \rightarrow 4H_3PO_4$. Therefore,the statement that pyrophosphoric acid contains two $P-H$ bonds is incorrect.

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